A straphanger was slugged in the face by an irate seatmate on a Manhattan-bound subway — but he managed to wrestle the “little b–ch” to the ground until cops could intervene. Alexander Rakitin, 42, was riding the N Train to his Manhattan finance job Monday morning when he sat down next to 34-year-old Timothy Barbee. As the train took off, the car jolted causing Rakitin’s knee to jostle Barbee’s — which set the alleged assailant off.